Johnson Matthey Public Limited Company

Orla Keane

Paul Richard Phillips

Robert James Brisley

Joanne Elizabeth Melville

Elizabeth Hazel Mountstevens

A method of reducing nitrogen oxides (NO) present in a lean gas stream comprising nitric oxide (NO) comprises the steps of: (i) net adsorbing NO per se from the lean gas stream in an adsorbent comprising palladium and a cerium oxide at below 200&#xb0; C.; (ii) thermally net desorbing NO from the NO adsorbent in a lean gas stream at 200&#xb0; C. and above; and (iii) catalytically reducing NOon a catalyst other than the NO adsorbent with a reductant selected from the group consisting of a hydrocarbon reductant, a nitrogenous reductant, hydrogen and a mixture of any two or more thereof. A system for carrying out such a method is also disclosed.

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Cambridge, United Kingdom

Orla Keane